Hello everyone! Greetings from Bulgaria.
We are planning the renovation of a brick house which we bought unfinished (just bricks and concrete). We are planning to plaster the interiors with a clay mix from our land and still wondering what to do in terms of exterior insulation. There aren't any breathable alternatives here in Bulgaria other than mineral wool, which is an imported and energy-intensive material. A friend mentioned the idea of hemp-lime or hemp-earth plaster, which if made thick (about 10 cm) would have insulation properties.
My questions are:
1. How insulative would this plaster be, is there any technical data out there?
2. Does anyone have a 'recipe' for the proportions used and are any other materials are added to the mix in addition to fibers and lime?
3. Can you recommend a better (more insulative) and inexpensive alternative?
I thought about using some kind of sheep's wool made into sheets below the plaster for an additional layer of insulation...
Thank you very much!
All the best,